<template>
    <div>
         <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区 -->
            <el-table :data="rolelist" border stripe>
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <!-- i1 -->
                        <el-row v-for="(item1,i1) in scope.row.children" 
                        :key="item1.id"
                        :class="['bdbottom',i1===0 ? 'bdtop':'','vcenter']"
                        >
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag>{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环渲染二级权限 -->
                                <el-row v-for="(item2,i2) in item1.children" 
                                :key="item2"
                                :class="[i2===0 ? '':'bdtop','vcenter']"
                                >
                                    <el-col :span="6">
                                        <el-tag type="success">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag 
                                        v-for="(item3) in item2.children" 
                                        :key="item3.id"
                                        type="warning"
                                        closable
                                        @close="removeRightById(scope.row,item3.id)"
                                        >
                                        {{item3.authName}}
                                        </el-tag>

                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                       <!-- <pre>{{scope.row}}</pre>  -->
                    </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <!--  -->
                        <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配权限的对话框 -->
        <el-dialog
            title="分配权限"
            :visible.sync="SetRightDialogVisible"
            width="50%"
            @close="setRightDialogClosed"
            >
            <!-- 树形控件 -->
            <el-tree 
            :data="rightslist" 
            :props="treeProps" 
            show-checkbox
            node-key="id"
            default-expand-all
            :default-checked-keys="defKeys"
            ref="treeRef"
            >
            </el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="SetRightDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return {
            //所有角色的列表数据
            rolelist:[],
            //控制分配权限的显示隐藏
            SetRightDialogVisible:false,
            rightslist:[],
            //树形控件的绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的ID值数组
            defKeys:[],
            roleId:''
        }
    },
    created(){
        this.getRoleList()
    },
    methods:{
        //所有角色的列表数据
        async getRoleList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !== 200){
                return this.$message.error('获取角色列表失败!')
            }
            this.rolelist = res.data
            // console.log(this.rolelist);
        },
        //根据ID删除对应的权限
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => err)
            if(confirmResult !== 'confirm'){
                return this.$message.info('取消了删除!')
            }
            const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200){
                return this.$message.error('删除权限失败!')
            }
            // this.getRoleList()
            role.children = res.data
        },
        //展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            //获取所有权限的数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status !== 200){
                return this.$message.error('获取权限失败!')
            }
            //获取全线数据保存到data中
            this.rightslist = res.data
            console.log(this.rightslist);
            //递归获取三级节点的id
            this.getLeafKeys(role,this.defKeys)

            this.SetRightDialogVisible = true
        },
        //通过递归获取三级权限的id 并保存到 defKeys 中
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item =>
            this.getLeafKeys(item,arr))
        },
        //监听分派权限对话框的关闭事件
        setRightDialogClosed(){
            this.defKeys = []
        },
        //点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
            if(res.meta.status !== 200){
                return this.$message.error('分配权限失败!')
            }
            this.$message.success('分配权限成功!')
            this.getRoleList()
            this.SetRightDialogVisible = false
        }
    }

}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
}
</style>